Cao Caos legendary campiagn help needed

I just gave up after many tries at some point most of the kingdoms end up in one coalition and do nothing but attack me and me alone if i join an alliance or coalition the allies dont help in any way and all the rest form another giant coalition which sends 1 or 2 stacks constantly from different points in the map. No matter what i do i cant deal with the constant spam also yuan shao has 4 stacks with only a couple of regions in their power if it attacks its game over.

i think there are certain triggers for enemy actions if you dont fully conquer the eastern part to the left of the river you don't get attacked from there. Also factions that are hostile to each other end up in good terms even if i spam cao caos special ability which allows them to focus only on myself

could anyone who beat it give advice?

Edit: this happens extremely early in the campaign when i have 5-6 settlements and only 1 and a half stack

Edit 2 Update: I tried to conquer north east and was successful but then everyone declared war on me, as a last ditch effort i made a coalition with liu bei and when all is lost it turns out liu bei has infinite full stacks he single handedly went to war with the entire enemy coalition and beat them so badly they all sued for peace i did kill a couple of stacks here and there but most of it was liu bei. This allowed me to expand south till i hit the river i cant keep going down yet cause im clearing the remnants of the coalition but i will right after all while also building up my economy without a risk of anyone declearing war to me. It looks like im going to make it assuming liu bei doesnt randomly turn on me he has 4 full stacks all next to each other
cao caos ability is good for preventing people in good terms to turn on you but it never works when people already hate you because the penalty is too large